Alarm.



PATENTED 00T. 18, 1904..=

D. N. SMITH.

ALARM. APPLICATION PILD Nov. 21.1903,

NO MODEL.

i i UNITED` STATES I Patented october 1s, 1904. y

PATENT OFFICE.

DAVIS N. SMITH, OE DEOATUR, TENNESSEE, ASSIGNOR OF ONE-HALE TO JESSE H. GUINN, OF DEOATUR, TENNESSEE.

ALANI.

` SPECIFICATION forming part of Letters Patent No. 772,480, dated October 18, 1904.

Application led November 21, 1903. Serial No. 182,175. (No model.)

To (LZZ whom, it may concern:

Be it known that I, DAvIs N. SMTTH, a citizen of. the United States, residing at Decatur, in the county of Meigs and State of Tennessee, have invented a new and useful Alarm, of which the following' is a specification.

This 'invention relates to an improved burglar-alarm, and has for its object to provide a simple, inexpensive, and efiicient device of the character adapted for ready attachment to a door or a window and so arranged as to V- sound an alarm when an attempt is made to open the door or raise the window.

A further object ofthe invention is to provide an alarm, vthe relative disposition of the several parts being such that when the doorl or window is opened a cap, cartridge, or similar detonating compound will be exploded and at the same time cause a match to be automatically lighted. l 1

The invention consists in the 'construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in form, proportion,.and minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

In the accompanying drawings, Figure 1 is' aperspective view of a portion of a door, showing a burglar-alarm constructed in accordance with my invention applied thereto. Eig. 2 is a longitudinal sectional view ofthe same. Fig. 3 is a transverse sectional view on the line 3 3 of Fig. -2. Fig. 4c is a perspective View illustrating a modified form of the invention. f I

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

I designates a door adapted to open inwardly, 2 the door-frame, and 3 my improved burglar-alarm.

. The alarm consists of a frame or casing,

preferably rectangular in shape, as shown, and comprising a pair of spaced longitudinal side bars or plates 4, between the opposite ends of which are riveted or otherwise sccured angularly-disposed arms 5 and` 6. The arms 5 and 6 are preferably arranged at right 'angles to each other and provided with one or more openings adapted to receive thumbscrews or similar fastening devices 7, by

a cap or cartridge placed on a nipple or tube 12, preferably formed integral with a longitudinal spacing-block 13, secured in any suitv able manner between the side bars of the frame. Pivoted between the bifurcated ends of the extension 9 is a link v111, the opposite end of which is pivotally connected to a flat spring 15, secured to the frame at a point adjacent'the arm 5, said spring being adapted to 7 O throw the hammer forward in Contact with the nipple 12 when the former is released. As a means for setting the hammer I provide a pivoted trigger-bar 16, the forward end of which is adapted to engage a shoulder 17, formed in the pivoted end of the hammer, said trigger-bar being heldin engagement with the shoulder when the hammer is cocked by means of a spring 18, mounted in grooves or channels 19 in the fixedend of the arm 6. 30 One end of the triggerbar 16 is provided lwith a fiat disk-shaped head 20, upon which is revolubly mounted a correspondinglyshaped trigger 21, the end of which extends in the path of the door or sash, so that when the door or sash is opened the trigger-bar will be depressed, releasing the hammer and Acausing the same to explode the cap or cartridge, and thereby sound the alarm. lThe lower portion of the side bars 4L are re- 90 cessed, as shown at 22, so that the trigger 21 will lie in substantially the same plane with the frame, thereby permitting said frame to fit flush against the door-casing when the alarm is in position, as clearly shown in Fig. 9`5 1 of the drawings'.

The block 13 is provided with one or more openings 22/, adapted to receive the cylinfrietional Contact with the roughened face of the arm 24 when the hammer is released.

By the term match I wish it understood that I mean any inammable or combustible material capable of being ignited by contact with a roughened or otherwise specially-prepared surface.

In practice the alarm is preferably placed against the lower portion of .the inside door- 'frame, with the arm 6 in contact with the floor and the trigger extending in the path of the door, as clearly shown in Fig. 1 of the drawings, being secured in such position by means of the screws 7. Should a person attempt to open the door in the direction of the arrow indicated in Fig. l, it will cause the trigger 2l to depress the trigger-bar 16, releasing the hammer and causing the same to explode the cap or cartridge. As the hammer descends the head of the match will eontact with the arm 24C, thereby igniting the same. rIhe door may be opened or shut with out operating the alarm by turning the trigger to one side and out of contact with said door, or, if desired, the alarm may be quickly detached by removing the screws, as will be readily understood.

In Fig. 4 I have shown a modified form of the invention, in which the head of the hammer 8 is provided with transversely-disposed openings 27, adapted to receive the matches 28, said matches being ignited as the hammer descends by contact with obliquely-disposed arms 29, secured on either side of the side bars of the frame. The trigger is also provided with an elongated opening or slot 30, by means of which said trigger may be moved in a horizontal plane to either side of the frame.

From the foregoing description it will be seen I have provided an extremely simple and effective alarm capable of being manufactured at a small cost and being of such small size and compact arrangement may be readily removed and carried about in the pocket.

Thile I have shown the alarm attached to the lower portion ot' the door-frame, it is ohvious the same may be attached at any convenient position thereon, the device being also applicable to windows, shutters, and the like.

Having thus described the invention, what is claimed is 1. In an alarm, a frame having angularlydisposed supportig-arms, means carried by the frame for supporti ng a detonator, a springactuated hammer for striking the same, a match carried by the hammer, a pivoted trigger-bar for locking the hammer, a trigger pivoted to the trigger-bar and adapted to be swung into and out of operative position, and a match-igniter mounted on the frame and arranged in the path of the hammer.

2. In an alarm, a frame comprising a pair of spaced longitudinal plates, supportingarms secured to the opposite ends of the l'rame and arranged at right angles to each other, means carried by the frame for supporting a detonator, a pivoted hammer for striking the same, a spring Secured to the frame, a pivotal connection between the spring and the hammer, a match carried by said hammer, a matchigniter mounted on the lrame, a springn pressed trigger-bar for locking the hammer, and a trigger pivoted to the trigger-bar and adapted to be swung into and out ol the path of a movable door or sash for releasing the hammer.

3. In an alarm, a frame comprising a pair of spaced longitudinal plates provided with alined terminal slots or recesses, means carried by the frame for supporting a detonator, a spring-actuated hammer for striking the same, said hammer being provided with an opening for the reception of a match, a trigger-bar pivoted to the frame for locking the hammer, a trigger pivoted to the trigger-bar and adapted to engage the terminal slots when said trigger is in the inoperative position, and a match-igniter mounted on the lrame and adjustable with relation to the hammer.

In testimony that I claim the Yforegoing as my own I have hereto allixcd my signature in the presence oi' two witnesses:

DAVIS N. SMITH.

Witnesses:

LUTHER Rien, II. B. Fos'rnn. 

